Leupold Alumina Flip Back Lens Cover Standard Ep 59055 n/a Imported Flip-back lens cover designed for Leupold Standard EP riflescopes Powerful neodymium magnet holds cover securely over the lens Triple O-ring seals provide max protection; flips open quickly and easily Clockable design lets you rotate cover to open in any direction Machined-aluminum precision construction; available in several sizes